package com.qd.system.service.dict;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.cdqidi.constant.ConstantDto;
import com.cdqidi.db.BaseService;
import com.cdqidi.dto.CacheKey;
import com.cdqidi.excel.ExcelExport;
import com.cdqidi.excel.util.ExportPage;
import com.cdqidi.exception.ApiException;
import com.cdqidi.util.RedisTemplateUtil;
import com.qd.common.sys.domain.entity.dict.DictTypeDTO;
import com.qd.system.mapper.DictTypeMapper;
import com.qd.system.model.DictType;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Optional;

import static java.util.stream.Collectors.toList;

/**
 * @author sjk
 */
@Service
@Slf4j
@RequiredArgsConstructor
public class DictTypeService extends BaseService<DictTypeMapper, DictType> {

    private static final String PREFIX_ID = "sys_dict_type_typeId_{0}";

    private final RedisTemplateUtil<DictType> redisTemplateUtil;
    private final HttpServletResponse response;

    /**
     * 保存
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public DictTypeDTO save(DictTypeDTO dto) {
        checkMb(dto);
        final DictType model = dtoToModel(dto);
        try {
            if (super.save(model)) {
                return modelToDto(model);
            }
            throw new ApiException("添加失败");
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 修改
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public DictTypeDTO update(DictTypeDTO dto) {
        checkMb(dto);
        final DictType historyModel = Optional.ofNullable(getById(dto.getTypeId())).orElseThrow(() -> new ApiException("ID不存在,不能更新"));
        final DictType model = dtoToModel(dto);
        try {
            if (super.updateById(model)) {
                return modelToDto(model);
            }
            throw new ApiException("更新失败");
        } finally {
            clearCache(historyModel);
            historyModel.freeData();
            model.freeData();
        }
    }

    /**
     * 批量添加
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void saveBatch(List<DictType> mList) throws ApiException {
        try {
            if (!super.saveBatch(mList)) {
                throw new ApiException("批量添加失败");
            }
        } finally {
            clearCaches(mList);
        }
    }

    /**
     * 批量更新
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void updateBatchIds(List<DictType> mList) {
        final List<String> ids = mList.stream().map(DictType::getTypeId).collect(toList());
        final List<DictType> historyModelList = checkIds(ids);
        try {
            if (!super.updateBatchById(mList)) {
                throw new ApiException("批量更新失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
            ids.clear();
        }
    }

    /**
     * 删除，单个
     *
     * @param typeId 主键
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeById(String typeId) {
        final DictType model = Optional.ofNullable(getById(typeId)).orElseThrow(() -> new ApiException("数据不存在,不能删除"));
        try {
            if (!super.removeById(typeId)) {
                throw new ApiException("删除失败");
            }
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 批量删除
     *
     * @param ids 主键集合
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeBatchIds(List<String> ids) {
        List<DictType> historyModelList = checkIds(ids);
        try {
            if (!super.removeByIds(ids)) {
                throw new ApiException("批量删除失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
        }
    }

    /**
     * 根据传入对象构建查询参数，判断是否存在
     *
     * @param dto 参数
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExists(DictTypeDTO dto) {
        final QueryWrapper<DictType> queryWrapper = createQueryWrapper(dto);
        boolean exists = super.count(queryWrapper) > 0;
        queryWrapper.clear();
        return exists;
    }

    /**
     * 根据主键判断数据是否存在
     *
     * @param typeId 主键
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExistsById(String typeId) {
        boolean exists = false;
        if (StringUtils.hasLength(typeId)) {
            final DictType model = getById(typeId);
            exists = (null != model);
            if (exists) {
                model.freeData();
            }
        }
        return exists;
    }

    /**
     * 根据主键获取数据
     *
     * @param typeId 主键
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public DictType getById(String typeId) {
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, typeId);
        return redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getById(typeId), DictType.class);
    }

    /**
     * 根据主键获取数据
     *
     * @param typeId 主键
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public DictTypeDTO getByIdDto(String typeId) {
        final DictType model = getById(typeId);
        if (null != model) {
            return modelToDto(model);
        }
        return null;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public DictType getOne(DictTypeDTO dto) {
        final QueryWrapper<DictType> queryWrapper = createQueryWrapper(dto);
        final DictType model = super.getOne(queryWrapper);
        queryWrapper.clear();
        return model;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public DictTypeDTO getOneDto(DictTypeDTO dto) {
        final DictType model = getOne(dto);
        if (null == model) {
            return null;
        }
        final DictTypeDTO newDto = modelToDto(model);
        model.freeData();
        return newDto;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据
     */
    @Transactional(readOnly = true)
    public List<DictType> getList(DictTypeDTO dto) {
        final QueryWrapper<DictType> queryWrapper = createQueryWrapper(dto);
        final List<DictType> list = super.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据，转换成页面对象
     */
    @Transactional(readOnly = true)
    public List<DictTypeDTO> getListDto(DictTypeDTO dto) {
        return modelToDtoList(getList(dto));
    }

    /**
     * 分页数据
     *
     * @param page 分页对象
     * @param dto  查询参数
     * @return 分页信息
     */
    @Transactional(readOnly = true)
    public IPage<DictTypeDTO> page(Page<DictType> page, DictTypeDTO dto) {
        final QueryWrapper<DictType> queryWrapper = createQueryWrapper(dto, "dic.");
        final IPage<DictTypeDTO> iPage = baseMapper.page(page, queryWrapper);
        queryWrapper.clear();
        return iPage;
    }


    /**
     * 清空缓存
     *
     * @param model 数据库对象
     */
    public void clearCache(DictType model) {
        if (null == model) {
            return;
        }
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getTypeId()));
    }

    /**
     * 批量清空缓存
     *
     * @param list 数据库对象
     */
    public void clearCaches(List<DictType> list) {
        if (null == list || list.isEmpty()) {
            return;
        }
        List<String> ids = list.stream().map(model -> RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getTypeId())).collect(toList());
        if (!ids.isEmpty()) {
            redisTemplateUtil.deleteByKey(ids);
            ids.clear();
        }
    }

    /**
     * 数据库对象转页面对象
     *
     * @param model 数据库对象
     * @return 页面对象
     */
    public DictTypeDTO modelToDto(DictType model) {
        if (null == model) {
            return null;
        }
        final DictTypeDTO dto = new DictTypeDTO();
        dto.setTypeId(model.getTypeId());
        dto.setName(model.getName());
        dto.setStatus(model.getStatus());
        dto.setRemark(model.getRemark());
        dto.setAddTime(model.getAddTime());
        dto.setUpdateTime(model.getUpdateTime());
        buildDisplay(dto);
        return dto;
    }

    /**
     * 页面对象转数据库对象
     *
     * @param dto 页面对象
     * @return 数据库对象
     */
    public DictType dtoToModel(DictTypeDTO dto) {
        if (null == dto) {
            return null;
        }
        final DictType model = new DictType();
        model.setTypeId(dto.getTypeId());
        model.setName(dto.getName());
        model.setStatus(dto.getStatus());
        model.setRemark(dto.getRemark());
        model.setAddTime(dto.getAddTime());
        model.setUpdateTime(dto.getUpdateTime());
        return model;
    }

    /**
     * 码表转换
     *
     * @param dto 页面对象
     */
    public void buildDisplay(DictTypeDTO dto) {
        final String statusName = MbUtil.idToDisplay(dto.getStatus());
        if (StringUtils.hasLength(statusName)) {
            dto.setStatusDisplay(statusName);
        }
    }

    /**
     * 数据库对象转页面对象
     *
     * @param list 数据库对象
     * @return 页面对象
     */
    public List<DictTypeDTO> modelToDtoList(List<DictType> list) {
        if (null == list) {
            return Collections.emptyList();
        }
        return list.stream().map(this::modelToDto).collect(toList());
    }

    /**
     * 页面对象转数据库对象
     *
     * @param list 页面对象
     * @return 数据库对象
     */
    public List<DictType> dtoToModelList(List<DictTypeDTO> list) {
        if (null == list) {
            return Collections.emptyList();
        }
        return list.stream().map(this::dtoToModel).collect(toList());
    }

    public QueryWrapper<DictType> createQueryWrapper(DictTypeDTO dto) {
        return createQueryWrapper(dto, "");
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto 查询参数，不为空的属性会被自动加入
     */
    public QueryWrapper<DictType> createQueryWrapper(DictTypeDTO dto, String tableAlias) {
        final QueryWrapper<DictType> queryWrapper = new QueryWrapper<>();
        if (null != dto) {
            if (StringUtils.hasLength(tableAlias) && tableAlias.charAt(tableAlias.length() - 1) != '.') {
                tableAlias += ".";
            }
            if (StringUtils.hasLength(dto.getTypeId())) {
                queryWrapper.like(tableAlias + "type_id", dto.getTypeId());
            }
            if (StringUtils.hasLength(dto.getName())) {
                queryWrapper.like(tableAlias + "name", dto.getName());
            }
            if (null != dto.getStatus()) {
                queryWrapper.eq(tableAlias + "status", dto.getStatus());
            }
            if (StringUtils.hasLength(dto.getBeginTime())) {
                queryWrapper.apply("date_format(" + tableAlias + "add_time,'%Y-%m-%d') >= {0}", dto.getBeginTime());
            }
            if (StringUtils.hasLength(dto.getEndTime())) {
                queryWrapper.apply("date_format(" + tableAlias + "add_time,'%Y-%m-%d') <= {0}", dto.getEndTime());
            }
        }
        return queryWrapper;
    }

    /**
     * 批量检查主键在数据库中是否存在
     *
     * @param ids 主键集合
     */
    public List<DictType> checkIds(List<String> ids) {
        if (null == ids || ids.isEmpty()) {
            throw new ApiException("ids不能为空");
        }
        final List<DictType> list = super.listByIds(ids);
        if (list.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(ids.toArray()));
        }
        if (ids.size() == list.size()) {
            return list;
        }
        List<String> dbIds = list.stream().map(DictType::getTypeId).collect(toList());
        final List<String> notExistsList = ids.stream().filter(id -> !dbIds.contains(id)).collect(toList());
        dbIds.clear();
        if (!notExistsList.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(notExistsList.toArray()));
        }
        return list;
    }

    /**
     * 码表验证
     *
     * @param dto 前段输入
     */
    private void checkMb(DictTypeDTO dto) {
        if (!MbUtil.isExists(dto.getStatus())) {
            throw new ApiException("状态值输入错误[" + dto.getStatus() + "]");
        }
    }

    public String isTypeIdValidate(String typeIdDisplay, List<String> errors) {
        if (StringUtils.hasLength(typeIdDisplay)) {
            final QueryWrapper<DictType> dictTypeQueryWrapper = new QueryWrapper<>();
            dictTypeQueryWrapper.eq("name", typeIdDisplay);
            try {
                final DictType dictType = getOne(dictTypeQueryWrapper, true);
                dictTypeQueryWrapper.clear();
                if (null == dictType) {
                    errors.add("字典类型错误:[" + typeIdDisplay + "]");
                } else {
                    return dictType.getTypeId();
                }
            } catch (MybatisPlusException e) {
                errors.add("字典类型包含多条数据:[" + typeIdDisplay + "]");
            }
        }
        return null;
    }

    /**
     * 导出Excel
     *
     * @param query 查询条件
     */
    @Transactional(readOnly = true)
    public void export(DictTypeDTO query) {
        final ExportPage<DictType, DictTypeDTO> exportPage = new ExportPage<>();
        try {
            final List<DictTypeDTO> list = exportPage.getAllForPage(page -> page(page, query).getRecords());
            try {
                ExcelExport.downloadExcel(response, DictTypeDTO.class, () -> list);
            } catch (IOException e) {
                log.error("导出失败", e);
                throw new ApiException("导出失败");
            }
        } finally {
            exportPage.freeData();
        }
    }

    @Transactional(readOnly = true)
    public String idToDisplay(String typeId) {
        String display = "";
        if (StringUtils.hasLength(typeId)) {
            DictType dictType = getById(typeId);
            display = (null == dictType ? "" : dictType.getName());
        }
        return display;
    }
}